#ifndef _NIC_H_#define _NIC_H_#include "config.h"#include "ip.h"#include "tcp.h"#include "udp.h"#include "arp.h"#include <stdint.h>#define NIC_BUFFERSIZE 1000extern uint32_t nic_ip;extern uint8_t  nic_mac[6];extern uint32_t nic_gateway_ip; void nic_init(void);inline void nic_send_packet(unsigned char *buffer, unsigned int len);inline unsigned int nic_receive_packet(unsigned char *buffer, unsigned int maxlen);void nic_copy_mac_to_buf(unsigned char * buffer);unsigned int nic_buffer_to_unsigned_int(unsigned char *buffer);uint32_t nic_buffer_to_ip(unsigned char *buffer);void nic_ip_to_buffer(unsigned char *buffer, uint32_t ip);unsigned long nic_buffer_to_seq(unsigned char *buffer);void nic_seq_to_buffer(unsigned char *buffer, unsigned long seq);#endif